Title
Amendment No. 2 to the Personal Services Agreement with Brown and Caldwell, Inc. (B & C) for Development of a Sanitary Sewer Master Plan
Body
RECOMMENDED ACTION (Motion):
Authorize the City Manager to execute Amendment No. 2 to the Personal Services Agreement (PSA) in the amount of $151,792.00 with Brown and Caldwell, Inc. in order to provide professional services necessary to complete an update to Oregon City's Sanitary Sewer Master Plan.
BACKGROUND:
The City last updated its Sanitary Sewer Master Plan in 2003. Most of the recommendations in 2003 were focused on the City's wastewater pump station improvement needs. This work is nearly complete. Sewer Master Planning for a City of Oregon City's size and complexity is considered needed every 10 years.
In preparation for a master plan update, in October 2011 the City's Public Works Department executed nearly $20,000 PSA with B & C to provide the professional services necessary to develop a flow monitoring strategy for collecting wet weather sanitary sewer flow information from the City's sanitary sewer collection system (Phase I).
In January of 2012 the City executed a contract amendment for the wet weather flow monitoring. The Amendment No. 1 services included implementation of the recommended flow monitoring strategy including 2 months of flow monitoring at 15 locations around the City's wastewater collection network. The flow data is needed to accurately document wet weather flows for future hydraulic modeling. The hydraulic model (Amendment No. 2) is the system evaluation tool which will help in the development of the SSMP. The model will identify areas with current system capacity concerns, build out capacity concerns, and areas within the system most likely to have leakage. Other components of the City's wastewater collection system will also be evaluated, however the capacity and conditions of our pipe networks are thought to be the emphasis for the 2013 Master Plan.
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